“I've owned these for the best part of a month now and have done some extensive listening with them both in extended listening sessions of several albums and of comparative listening sessions with with my HD650. I feel I am ready to comment on the qualities of these phones.
I had always intended to put these and the HD650 against each other and sell one, as I had thought it would be an...” --EddieE

“
Lets start with:
Design, build quality & comfort:
They are white - thats what people notice on the first look. I must say I really like the design and the "feel" - The leather headband is a nice addition to the white and gray colors.
Build quality is very very good - they are very sturdy and don't feel like breaking apart after a month. I dropped them incidentally few...” --JeckyllAndHyde

“Introduction
I got these headphones around the national holiday. These came out about 2 years after I had got my K701. I was first attracted by its classy design and colour. I thought I would never get another pair of AKG headphones since K701 has been my favorite all the time. I finally decided to purchase a pair due to the discounted price of $180 USD including shipping in my country; and...” --QBoQBo

“Review on the AKG K240 MK. II
It's been a while since I wrote up a review, and well...I'm back again with another write up!
Introduction
Lately, I've been on the prowl for a pair of headphones that offer the open/semi-open back design, as I was curious about these types of headphones. Coming from a pair of V-Moda M100's, I was really after a quality alternative to the...” --SkyBleu

“TL;DR Review of the AKG Q701’sAccentuated Mids: Enhances most female vocals, also forwards vocals, “livens” synthesizers in electronic music. Can cause vocals to sound uneven due to the 2khz bump.Grainy/Textured Treble: Gives texture and dynamics to ride cymbals and high hats, may force treble into songs that suffer with treble. i.e. Metal genres. Not to be confused with “sparkly...” --Nec3

“I came to this headphone after 10 months with a Philips X1. Although the X1 is a good headphone, towards the end of my time with it, I become increasingly dissatisfied with its sound signature.
I stopped listening to music regularly and for a long time I didn't realize that the X1 was to blame! Although every time I used it I would be impressed by its abilities, the sound was ultimately just...” --Mr Vicarious

“AKG K712 Pro Review
This is a review I have put off for a long time, I've owned the AKG K712 Pro for about a year now and have tried it on numerous systems. The source is a variety of uncompressed music files on the computer playing through Foobar2000. I'll try to keep this review short and simple, may try to update it later. To put it simply, the K712 is my favorite headphone I...” --kman1211

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This headphone is one of the best headphones for classical music. Others in the same price range would be Audio Technica ATH-AD900, Beyer DT880, AKG k701. I think that k501 can even challenge some other dynamic headphones in higher price ranges. It is definately better than Sennheisers offerings HD650/600, for classical. This is a real classic, one of a kind.
” --szoze

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AKG K-240 Studio are at least the 4th (really 5th or 6th?) iteration of K-240 design, which started with the K-240 Sextett in the 1970s, themselves a circumaural version of supra K-140. The basic idea behind the "Sextett" design is that the main diaphragm drives six passive radiators, which enhance ambience and spatial imaging. Now, while this is a very good idea for headphones in an era when...” --Seidhepriest

“To start this review off, I've owned several AKGs, including the Q701 Quincy Jones, the K702 65th Anniversary, K240 MK II, and until a few months ago, the K612 Pro. I was craving another AKG, and before I pulled the trigger on the pumpkin-colored USD 350-400 K712 Pro, the internet bulk buying site Massdrop announced that they were partnering with AKG to make the special edition K7XX Massdrop...” --bpandbass